DI with CDI and 3rd party class: avoid constructor doing business logic called multiple times for each proxy construction

Question

I'm relativly new to EE / CDI for DI so maybe one of you could provide me with some tips for my problem:

I've got a 3rd party class which I would like to inject into other beans. In spring just needs some <bean> declaration and it's done. Using cdi it now takes a factory class:

public class XProducer {    
    @Produces
    @ApplicationScoped
    public X createX(){
        return new X();
    }
}

Unfortunatly X`s constructor invokes rather expensive business logic and every time a proxy is created by cdi it's called but I can't change X's behaviour. This leaves me with the following options I don't really like:

• wrapping X in some ugly Holder-class,
• creating some facade and have to delgate methods to X

Are there any other options left?

Answer 1

This is probably a case where you want to use @javax.inject.Singleton since its a third party, you won't need interceptor support, and singleton does not generate a proxy, so the constructor will only be called once.